Bus voltage balance control method, device, equipment and storage medium

Abstract

The application provides a bus voltage balance control method, device, equipment and storage medium, the method comprises the following steps: the middle vector is reconstructed, each middle vector is expressed by two small vectors with different polarities and the combination of the middle vector, the average midpoint current of the reconstructed middle vector is zero by using the characteristic that the three-phase current sum is zero, and the influence of the middle vector on the bus voltage balance is eliminated from the root; meanwhile, when the optimal switching state corresponds to a small vector, the switching state capable of reducing the voltage deviation is selected from two redundant small vectors according to the sign of the midpoint voltage, and the active balance of the bus voltage is realized. The method does not need to introduce a weight factor in the cost function, reduces the control complexity, and can effectively maintain the bus voltage balance under all working conditions, improves the stability and output quality of the system.

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